109.070 Establishing paternity.

(1) The paternity of a person may be established as follows:(a) A man is rebuttably presumed to be the father of a child born to a woman if he and the woman were married to each other at the time of the child’s birth, without a judgment of separation, regardless of whether the marriage is void.
(b) A man is rebuttably presumed to be the father of a child born to a woman if he and the woman were married to each other and the child is born within 300 days after the marriage is terminated by death, annulment or dissolution or after entry of a judgment of separation.
(c) By the marriage of the parents of a child after the birth of the child, and the parents filing with the State Registrar of the Center for Health Statistics the voluntary acknowledgment of paternity form as provided for by ORS 432.287.
(d) By filiation proceedings.
(e) By filing with the State Registrar of the Center for Health Statistics the voluntary acknowledgment of paternity form as provided for by ORS 432.287. Except as otherwise provided in subsections (4) to (7) of this section, this filing establishes paternity for all purposes.
(f) By having established paternity through a voluntary acknowledgment of paternity process in another state.
(g) By paternity being established or declared by other provision of law.

(2) The paternity of a child established under subsection (1)(a) or (c) of this section may be challenged in an action or proceeding by the husband or wife. The paternity may not be challenged by a person other than the husband or wife as long as the husband and wife are married and cohabiting, unless the husband and wife consent to challenge. [More]